线偏振CO_2激光对非金属材料切缝的影响  

Effect of linear polarized CO_2 lasers on cut kerfs of nonmetallic material

作　　者：谢小柱[1] 魏昕[1] 胡伟[1] 

机构地区：[1]广东工业大学机电工程学院,广州510006

出　　处：《激光技术》2008年第4期399-401,416,共4页Laser Technology

基　　金：国家自然科学基金资助项目(50675038);广东省科技计划基金资助项目(2004B10201018);广州市科技计划基金资助项目(2005J1-C0081);校博士启动基金资助项目(073005)

摘　　要：为了研究线偏振CO2激光对高吸收率非金属材料的影响,采用线偏振CO2激光沿着不同的方向切割模切板,研究不同激光功率、切割速度、切割方向、辅助气体对切缝宽度的影响,同时对比线偏振激光切割低碳钢。试验结果表明,改变激光功率和切割速度对模切板进行切割,上、下切缝沿不同方向之间的宽度相差不大,即偏振性对高吸收率非金属材料模切板的切缝影响不大,但是对金属材料影响很大。辅助气体N2和空气对上下切缝的影响不大,从经济角度应优先选择空气;为了得到上下均匀一致的切缝,同一激光功率下,切割速度应小些,而同一切割速度下,激光功率应大些。Highly absorptive nonmetallic material,die-board, was cut by linear polarized CO2 lasers through eight different directions. Effect of laser power, cutting speed and assisted air on the width of the cut kerfs of the die-board was also discussed by contrast with that of lower carbon steel. The results indicate that the difference between the top and the bottom kerfs width of the die-board along eight directions is not sensitive to linear polarization with altering laser power and cutting speed, while the kerf width difference of steel is on the contrary. Assisted gas such as N2 and air has little effects on the kerf, therefore air should be selected in view of lower cost. Uniform cut kerfs can be achieved with lower cutting speed under certain laser power or higher laser power at a certain cutting speed.

关 键 词：激光技术 CO2激光切割 线偏振 切缝 模切板 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]